PROCESO PARA LA PREPARACION DE TABLETAS FARMACEUTICAS O MEDICINALES DE ADMINISTRACION ORAL, CON LIBERACION RETARDADA DELAGENTE ACTIVO, EN TABLETAS EN LAS QUE LA CANTIDAD DE LIBERA-CION DEL AGENTE ACTIVO ES PREDETERMINADA.

摘要

A process for the preparation of matrix-type tablets with retarded liberation of the active agent. The liberation of the active agent from the tablets takes place at a speed that has been adjusted precisely in advance. In the granulation process, polymethacrylate plastics insoluble in neutral or slightly acid water either as dissolved in an organic solvent or as a water dispersion are used as the retarding matrix substance. Before the tablets are compressed, an ester of a large-molecule fatty acid or a product obtained from same by means of hydrogenation is mixed into the grain mix in order to adjust the rate of liberation of the active agent.